| 1. |
Yamashita K, Wu Z, Yin W, Zhu Z, Li T, Wang L, Li G, Zhu H, Zhang H, Lin W, and UNC/UMN Baby Connectome Project Consortium , A Negative Association Between Cortical Thickness and Symmetrical Functional Connectivity Strength in the Visual Cortex During the First 2 Years of Life, 106th Scientific Assembly and annual Meeting of Radiological Society of North America, 2020.12. |
| 2. |
Koji Yamashita, Functional Development of Anteromedial Heschl’s Gyrus During Infancy, AIMS Neuro Imaging 2020, 2020.10. |
| 3. |
Yamashita K, Zhang H, Li T, Hung SC, Yin W, Wen X, Jing B, Kam T, Hsu LM, Yap PT, Wang L, Li G, Baluyot KR, Howell BR, Styner MA, Yacoub E, Chen G, Potts T, Gilmore JH, Piven J, Smith JK, Ugurbil K, Elison JT, Hazlett H, Zhu H, Shen D, Lin W
, Symmetrical Functional Connectivity Strength Between Bilateral Anteromedial Heschl’s Gyri Are Negatively Associated With Receptive Function During Infancy, 105th Scientific Assembly and annual Meeting of Radiological Society of North Americ, 2019.12. |
| 4. |
Yamashita K, Wu Z, Zhang H, Yin W, Zhu Z, Luo T, Wen X, Jing B, Kam TE, Ksu LM, Yap PT, Wang L, Li G, Li T, Baluyot KR, Howell BR, Styner MA, Yacoub E, Chen G, Potts T, Gilmore JH, Piven J, Smith JK, Ugurbil K, Hazlett H, Zhu H, Elison JT, Shen D, Lin W, Prediction of Motor Function Development in Infants Using the Thickness of the Primary Motor Cortex, 25th Annual Meeting of the Organization for Human Brain Mapping, 2019.06. |
| 5. |
Koji Yamashita, Akio Hiwatashi, Osamu Togao, Kazufumi Kikuchi, Hiroshi honda, Differentiating Primary Central Nervous System Lymphoma from Glioblastoma: Probabilistic Analysis using Voxel-based Morphometry, ASNR 56th Annual Meeting & NER Foundation Symposium 2018, 2018.06. |
| 6. |
Koji Yamashita, Akio Hiwatashi, Osamu Togao, Kazufumi Kikuchi, Hiroshi Honda, Ultra-High Resolution CT Scan of the Temporal Bone, ASNR 56th Annual Meeting & NER Foundation Symposium 2018, 2018.06. |
| 7. |
Koji Yamashita, Akio Hiwatashi, Osamu Togao, Kazufumi Kikuchi, Hiroshi Honda, Computed diffusion weighted imaging with noise reduction: Utility in diagnosing middle ear cholesteatoma, 103rd Scientific Assembly and annual Meeting of Radiological Society of North America, 2017.11. |
| 8. |
Yamashita Koji, Predicting IDH1 and TERT Mutation Status in the patients with Glioblastoma, AIMS Neuro Imaging 2017, 2017.10. |
| 9. |
Yamashita Koji, Hiwatashi Akio, Osamu Togao, Daichi Momosaka, Nozomu Matsumoto, Kouji Kobayashi, Hiroshi Honda, Computed diffusion weighted imaging with noise reduction: improvement of contrast-to-noise ratio in middle ear cholesteatoma
, 第76回日本医学放射線学会総会, 2017.04. |
| 10. |
Yamashita Koji, Hiwatashi Akio, Osamu Togao, Daichi Momosaka, Koji Yoshimoto, Hiroshi Honda, TERT promoter mutation prediction using support vector machine (SVM) in patients with wild-type IDH1 Glioblastoma, ASNR 55th Annual Meeting & NER Foundation Symposium 2017, 2017.04. |
| 11. |
Yamashita Koji, Hiwatashi Akio, Osamu Togao, Masatoshi Kondo, Hiroshi Honda, Visibility Improvement of the Artery of Adamkiewicz by High-Dose Intravenous CT Angiography: Qualitative and Quantitative Analysis, 102nd Scientific Assembly and annual Meeting of Radiological Society of North America, 2016.11. |
| 12. |
Yamashita Koji, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Hiroo Yamaguchi, Hiroshi Honda, Arterial Spin Labeling as a Biomarker for the Detection of Early Stages of Parkinson’s disease, ASNR 54th Annual Meeting & NER Foundation Symposium 2016, 2016.05. |
| 13. |
山下 孝二, 樋渡 昭雄, 栂尾 理, 菊地 一史, 吉本 幸司, 本田 浩, Diagnostic Utility of Intravoxel Incoherent Motion MR imaging in Differentiating Primary Central Nervous System Lymphoma from Glioblastoma Multiforme, 第75回日本医学放射線学会総会, 2016.04. |
| 14. |
Yamashita Koji, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Masatoshi Kondo, INOGUCHI TAKASHI, Hiroshi Honda, The Radiological Diagnosis of Fenestral Otosclerosis: the Utility of Histogram Analysis using Multidetector row CT , 101st Scientific Assembly and annual Meeting of Radiological Society of North America, 2015.11. |
| 15. |
Yamashita Koji, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Koji Yoshimoto, Hiroshi Honda, Diagnostic utility of the combination of intravoxel incoherent motion MR imaging and 18FDG-PET in differentiating primary CNS lymphoma from glioblastoma multiforme, 10th Asian Oceanian Congress of Neuroradiology, 2015.11. |
| 16. |
Yamashita Koji, Hiwatashi Akio, Masatoshi Kondo, Osamu Togao, Kazufumi Kikuchi, INOGUCHI TAKASHI, Hiroshi Honda, Additive value of “Otosclerosis-weighted” images for the diagnosis of fenestral otosclerosis, 101st Scientific Assembly and annual Meeting of Radiological Society of North America, 2015.11. |
| 17. |
前原 純樹, 山下 孝二, 樋渡 昭雄, 栂尾 理, 菊地 一史, 松本 嘉寛, 本田 浩, 脊椎原発 phosphaturic mesenchymal tumorの一例, 第181回日本医学放射線学会九州地方会, 2015.07. |
| 18. |
Yamashita Koji, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Tomoyuki Okuaki, Nozomu Matsumoto, Koji Kobayashi, Hiroshi Honda, T1ρ imaging in middle ear cholesteatoma, International society for magnetic resonance in medicine, 2015.06. |
| 19. |
田原圭一郎, 山下 孝二, 樋渡 昭雄, 栂尾 理, 菊地 一史, 遠藤 誠, 小田 義直, 本田 浩, 胸椎原発平滑筋肉腫の一例, 第180回日本医学放射線学会九州地方会, 2015.02. |
| 20. |
Yamashita Koji, Masatoshi Kondo, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Hiroshi Honda, Prognostic value of CT histogram analysis in comatose patients: evaluation using automated whole-brain extraction algorithm, 100th Scientific Assembly and annual Meeting of Radiological Society of North America:, 2014.11. |
| 21. |
Yamashita Koji, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Ryusuke Hatae, Koji Yoshimoto, Masahiro Mizoguchi, Satoshi O Suzuki, Takashi Yoshiura, Hiroshi Honda, MR imaging Based Analysis of Glioblastoma multiforme: Estimation of IDH1 Mutation Status, ASNR 52th Annual Meeting & NER Foundation Symposium 2014, 2014.05. |
| 22. |
Yamashita Koji, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Hiroshi Sugimori, Takashi Yoshiura, Hiroshi Honda, Prognostic utility of CT histogram analysis in post-cardiac arrest syndrome: evaluation using automated whole-brain extraction algorithm, KSNHNR annual meeting & neuroradiology forum-2014, 2014.04. |
| 23. |
Yamashita Koji, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Hiroshi Sugimori, Takashi Yoshiura, Hiroshi Honda, Prognostic value of CT histogram analysis in post-cardiac arrest syndrome: evaluation using automated whole-brain extraction algorithm, 第73回日本医学放射線学会総会, 2014.04. |
| 24. |
Yamashita Koji, Takashi Yoshiura, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Makoto Obara, Nozomu Matsumoto, Hiroshi Honda, Usefulness of High-resolution Three-dimensional Diffusion-weighted Imaging of Middle Ear Cholesteatoma: Compared to Single-shot Echo-planar Diffusion-weighted Imaging , ASNR 51th Annual Meeting & NER Foundation Symposium 2013, 2013.05. |
| 25. |
Yamashita Koji, Takashi Yoshiura, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Makoto Obara, Nozomu Matsumoto, Hiroshi Honda, High-resolution three-dimensional diffusion-weighted MRI / CT image data fusion for cholesteatoma surgical planning: a feasibility study
, 99th Scientific Assembly and annual Meeting of Radiological Society of North America, 2013.12. |
| 26. |
Yamashita Koji, Takashi Yoshiura, Hiwatashi Akio, Osamu Togao, Kazufumi Kikuchi, Seiji Kumazawa, Takashi Inoguchi, Hiroshi Honda, Diagnosis of otosclerosis: the utility of histogram-based analysis of multidetector row CT images, 99th Scientific Assembly and annual Meeting of Radiological Society of North America, 2013.12. |
| 27. |
Yamashita Koji, Takashi Yoshiura, Hiwatashi Akio, Osamu Togao, Nozomu Matsumoto, Kazufumi Kikuchi, Makoto Obara, Hiroshi Honda, Usefulness of High-resolution Three-dimensional Diffusion-weighted Imaging of Middle Ear Cholesteatoma: Compared to Single-shot Echo-planar Diffusion-weighted Imaging
, ASNR 51th Annual Meeting & NER Foundation Symposium 2013, 2013.05. |
| 28. |
Yamashita Koji, Takashi Yoshiura, Hiwatashi Akio, Osamu Togao, Koji Yoshimoto, Kazufumi Kikuchi, Satoshi O Suzuki, Hiroshi Honda, Additive value of arterial spin labeling in differentiating primary CNS lymphoma from glioblastoma multiforme: an observer performance study, European Congress of Radiology 2013, 2013.03. |
| 29. |
山下 孝二, 吉浦 敬, 樋渡 昭雄, 栂尾 理, 菊地 一史, 松本 希, 小原 真, 本田 浩, 高解像度三次元拡散強調画像を用いた真珠腫性中耳炎の描出：Single-shot EPI法との比較, 第42回日本神経放射線学会, 2013.02. |
| 30. |
Yamashita Koji, Takashi Yoshiura, Hiwatashi Akio, Osamu Togao, Koji Yoshimoto, Masahiro Mizoguchi, Koichiro Abe, Kazufumi Kikuchi, Yasuhiro Maruoka, Hiroshi Honda, Differentiating primary CNS lymphoma from glioblastoma multiforme: assessment using arterial spin labeling, diffusion weighted imaging, and 18F-fluorodeoxyglucose positron emission tomography , RCNEA (Radiology Congress of North East Asia), 2012.09. |
| 31. |
山下 孝二 吉浦 敬 樋渡 昭雄 栂尾 理 菊地 一史 吉本 幸司 溝口 昌弘 鈴木 諭 岩城 徹 本田 浩
, 血管芽細胞腫と転移性脳腫瘍の鑑別：Arterial spin labeling法を用いた定量的評価, 第41回神経放射線学会, 2012.02. |
| 32. |
Koji Yamashita, Takashi Yoshiura, Akio Hiwatashi, Osamu Togao, Masahiro Mizoguchi, Koji Yoshimoto, Koichiro Abe, Kazufumi Kikuchi, Yasuhiro Maruoka , Hiroshi Honda, Differentiating primary CNS lymphoma from glioblastoma multiforme: assessment using arterial spin labeling, diffusion weighted imaging, and 18F-fluorodeoxyglucose positron emission tomography, ASNR 50th Annual Meeting & the Foundation of the ASNR Symposium 2012, 2012.04, Background and Purpose: PCNSLs are usually treated by chemotherapy and whole-brain radiotherapy, without extended surgical mass reduction. On the other hand, in the vast majority of cases with a clinically and radiographically suspected GBM, gross surgical resection is attempted. Therefore, pretreatment differentiation between PCNSL and GBM is essential for therapeutic decision-making. ASL is an emerging MR perfusion imaging technique that utilizes magnetically labeled arterial blood as an intrinsic tracer. Our purpose was to evaluate the diagnostic performance of ASL, DWI and FDG-PET in differentiating PCNSLs from GBMs.
Materials and Methods: Fifty-six patients including 19 with PCNSL and 37 with GBM were retrospectively studied. From the ASL data, aTBF and rTBF were obtained within the enhancing portion of each tumor. In addition, ADCmin and SUVmax were obtained from DWI and FDG-PET data, respectively. Each of the four parameters was compared between PCNSLs and GBMs using Mann-Whitney U test. The performance in discriminating between PCNSLs and GBMs was evaluated using the receiver-operating characteristics analysis. Inter-observer reliability between the two neuroradiologists was also analyzed.
Results: The aTBF and rTBF values were significantly higher in GBMs than in PCNSLs for both observers (pConclusion: ASL perfusion imaging is useful for differentiating PCNSLs from GBMs as well as DWI and FDG-PET.. |
| 33. |
Koji Yamashita, Takashi Yoshiura, Akio Hiwatashi, Osamu Togao, Koji Yoshimoto, Satoshi O. Suzuki, Kazufumi Kikuchi, Masahiro Mizoguchi, Toru Iwaki, Hiroshi Honda, , Arterial Spin Labeling of Hemangioblastoma: Differentiation from Metastatic Tumors Based on Quantitative Blood Flow Analysis , ASNR 49th Annual Meeting & the Foundation of the ASNR Symposium 2011, 2011.06, BACKGROUND AND PURPOSE: Hemangioblastoma and metastatic tumors are the major differential diagnoses for the posterior fossa tumors in adults. Our purpose was to evaluate the efficacy of ASL in differentiating hemangioblastomas from metastatic brain tumors.
MATERIALS AND METHODS: A total of 19 patients including 5 with a hemangioblastomas and 14 with metastatic tumors (7 from lung cancer, 4 from breast cancer, 1 from RCC, 1 from gastric cancer and 1 from unknown origin) were enrolled in this study. ASL was performed using a pulsed ASL method at a 3T unit. aTBF was measured as a mean absolute blood flow value within a region-of-interest drawn in the tumor. In addition, rTBF was obtained by normalizing the aTBF by a blood flow measured in the normal-appearing cortical gray matter. The aTBF and rTBF values were compared between hemangioblastomas and metastatic tumors using Student’s t test.
RESULTS: Both the aTBF and rTBF values were significantly higher in hemangioblastomas (mean aTBF ± SD = 437 ± 274 mL/100g/min, mean rTBF ± SD = 7.96 ± 3.12) in comparison with metastatic brain tumors (mean aTBF ± SD = 125 ± 134 mL/100g/min, mean rTBF ± SD = 2.98 ± 3.91) (pCONCLUSION: Our results demonstrated that ASL provides useful information to differentiate between hemangioblastomas and metastatic brain tumors. Metastasis from RCC may mimic hemangioblastoma on ASL blood flow measurement.. |
| 34. |
Koji Yamashita, Takashi Yoshiura, Akio Hiwatashi, Hironori Kamano,
Tuvshinjargal Dashjamts , Shumei Shibata, Akihiro Tamae, Hiroshi Honda
, Detection of middle ear cholesteatoma by diffusion-weighted MR imaging: multi-shot EPI compared to single-shot EPI, Radiological Society of North America 96th scientific assembly and annual meeting, 2010.11. |
| 35. |
Koji Yamashita, Takashi Yoshiura, Akio Hiwatashi, Tuvshinjargal Dashjamts, Hironori Kamano, Takashi Inoguchi, Hiroshi Honda, Sensorineural Hearing Loss: CT Study of Lateral Semicircular Canal Morphology
, American Society of Neuroradiology 48th Annual Meeting, 2010.05. |
| 36. |
Koji Yamashita, Takashi Yoshiura, Akio Hiwatashi, Hironori Kamano, Yukihisa Takayama, Eiki Nagao, Hiroshi Honda, Ultrashort echo time imaging of middle ear ossicle: a pilot study. , International Society for Magnetic Resonance in Medicine, 2010.05. |
